Improvement in school-globes



UNITED STATES PATENT Carien.y

Jenn n. Acnnw, or MnRcEnsBURo, PENNSYLVANIA-' IMPROVEMENT vIN scHooL-Gtoss.

Specification forming part of Letters Patent No. 36,357, dated September 9, lirill. I

To all whom t may concern: Beit known that l, JOHN R. AGNEW, of Mercersburg, in the county O fFranklin and State of Pennsylvania, have vinvented certain new and useful Improvements in School-Globes; and I `do hereby declare that the fol-lowing is a full,

`being indicated bythe line a: x, Fig. 2. Fig.

2 is a plan ortop view of the same. Fig. 31's a sectional sideelevation of the permanent pedestal and slidingarr'n's without. the globe. Fig. 4 is a sideelevation of a globe and pedestal, the globe being divided according to two or more parallel circles.

Similar letters of reference indicate corre' spending parts in the severaliigures.

This invention relates tocertain improve ments in thatclass oldschool-globes for which Letters Patent have been granted to me July 24, 1860. l

The invention consists in mounting two hemispheres in 'armed standards which slide in parallel planes toward or-from each otherin' such a manner that on separating said hemispheres the several parts or lines marked on their inner and outer surfaces retain their relati've position opposite to each other. It consists, further, in the arrangementof a primary pedestal provided with a series of screwvsockf ets in combination with ascrew-shank project ing from the lower end of the head, in which the armed standards of the. hemispheres slide in such a manner that one or more-globcs'can be placed on theprimary pedestal ortaken from the same and returned to their original pedestals at pleasure. It consists, also, in combining with the sliding armed standards slotted swivel-sockets in such a manner that'the globe.

can be turned freely in either direction. 1

To enable those skilled in the art to fully un derstand and construct my invention`I will proceed to describe it with reference tothe drawings. p

The hemispheres A A', which, when brought together, represent on theontside a terrestrial and on'the insidea celestial globe, are sus pended from pivots or screws a rt', which have their bearings in the upper ends of standards of two rings, B B', which may represent the prime meridian andthe rational horizon or any .other two great circles drawn on the surface -of theglobc in planes at right angles to each other. These rings are divided in the same plane as the globe, so that they open and close with the hemispheres.

From the lower endsof the standards b b d d', whichY are firmly attached to the head C.

. ports D ot the two hemispheres, and by sliding and the different lines and points of the two hemispheres retain their relativeI positions toward each otheras much as possible. When the said hemspheres are opened parallel, in the manner described, the pupils will readily easier for them than when the hemispheres swingl apart in the manner described in lmy are retained in the desired position byaspringcatch, G.

The head C, fromwhich the'sockets d d extend, is provided with a screw-shank, e, which screws into the ordinary pedestal, E, as shown in Figs. 3 andl 4, and which may be unscrewed from said pedestal and inserted into the pri-1 marypedestal F, as shown in Figs. l and 2. This pedestal consists of .a table or platform, f, supported by a frame, g, and said frame is provided with a drawer, h, which serves to receive such tools or other articles 'as may be `requisite in giving lessons in astronomy. The platform f is furnished with several sockets, t', to receive the screw-Shanks of the heads C of swivel-globes simultaneously, when desired, and by these means two or more globes can be exhibited to the pupils 'in various positions and changes and provided with dillercnt lines whereby the relation of these lines toward cach other is rendered much more intelligible and easier to comprehend than by using one globe with ever so many lines marked or representedthereon.v

b b', and which also pass through the junction armsccextend, and these arms slide in sockets The armsc c and standards b b form thesup said supports in and yout in the sockets d d3;

the hemispheres are separated or brought toy y gether,'as lmay be desi-red, and during thisrv y motion all the partsmoveinhorizontaly planes,

understand the relation of "the terrestrial andof the celestial lines; -at least it will be much formerfLettcrs Patent. y The armed standards and wateron the. terrestrial iglobe.`

l demonstrating th The sockets dd', in which the armed stand ards or supports ,D slidegmay-either be permanently attached to the head G, or they may be connected to sameby means of a swivel, d", asshown inj Fig. 1, where said swivel dX is `represented in section, being atta'ched'to the head CX. The head 'CX is furnished witha small globe, a?, representing .the-earth, andf the hemispheres A A are now` inserted. into the swivel-sockets ldxand separated far enough to observe the little globe a?? the apparent daily motion of the stars round the earth can be illustrated; or several small globe'slaX b, &c.,

representing an orrery, may be-arranged on the .head CX, land by placing the'hemispheresA- A' into the swivel-sockets. the relation of the sun and planets toward the-fixed stars can be illustrated. TheA swivel-,socket is also vveryv handy for thle purpose of explaining and-demonstratingthelinesg,and the formationo'f land Instead ofdivding theiglobe in two. heinispheres it may' in lsome cases bedesirable to divide the same into threeor'more paris5 fol-V lowing the tropic orpolar circles, or the colures,

or any other line ghicht-lnay be'convenient in relations ofthe terrestrial andzcelestiallinesl-f .In doing sol I have. :con-v ynected theseveralparts of the globe by spring, i, slides j (see: Fig.4,)1which project fromthe edges ofuonepart and't into corresponding l vsdcketsiu .Ltheedgegolthc other partsof the" I globe. When properlyy connected by means of these slides, the globe-,appears to be of one piece, and at the same time it can be taken I apartand put together very easy and Without loss ottime.

- A globe, Ar, of this inscription may be usedincombinationtwithgthesliding supportsA D,

as represented in Fig. 4, orit'may be :used iiidependent of said supports, orV mounted in the ordinary manner. y y 7 ,p Having thus fully described my invention, what I claim as'new, and desire tosecure by Letters Patent, v.is- I 1. The arrangement of-the .armed sliding:

standards or supports D, in combination with the hemispheres A A', constructed andfoperatingsubstantially as andlorV ille purpose shown and described. l 

